The author implies that the use of mobile phones in such places as museums should be ________.

A．use a more sensitive microphone
B．shout loudly into your microphone
C．go away quietly to continue the phone call
D．use your hand to help speak into the phone

A．you prefer to talk to your friends at the table
B．you value your calls more than your friends
C．you are enjoying the company of your friends
D．you are polite and considerate of your friends